crypto: testmgr - Added testvectors for the rfc3686(ctr(sm4)) skcipher

Added testvectors for the rfc3686(ctr(sm4)) skcipher algorithm

changes since v1:
- nothing

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>